Performance, microbial community and inhibition kinetics of long-term Cu stress on an air-lift nitritation reactor with self-recirculation.

Biological nitrogen removal process could be affected due to the presence of heavy metals owing to their toxicity and accumulation in the sludge. In this study, the impact of Cu shock on a long-term nitritation operation was investigated in an air-lift reactor with self-recirculation. Both the dynamics of microbial community and inhibition kinetics under Cu stress were ascertained.

Comparative evaluation of short-term stress of Cd(II), Hg(II), Pb(II), As(III) and Cr(VI) on anammox granules by batch test.

Batch experiments were conducted to investigate the short-term effects of Cd(II), Hg(II), Pb(II), As(III) and Cr(VI) on anammox activity, which are considered to be the top 5 toxic heavy metals in China. The IC values of Cd(II), Hg(II), Pb(II) and Cr(VI) were calculated to be 7.00, 2.